こんにちは！「100日後にそろばん完全マスター！」の主です。 Youtube37日目の動画「暗算6級 2桁×1桁のかけ暗算」の内容を簡単に解説します。 第二章のそろばん10.9級編のかけ算のやり方をマスターしていれば、2桁×1桁のかけ暗算の計算もスムーズにできる ...

こんにちは！「100日後にそろばん完全マスター！」の主です。 Youtube86日目の動画「暗算2級 2桁×2桁のかけ暗算のやり方」の内容を簡単に解説します。 Hello! This is the host of "Abacus Master in 100 Days." A quick explanation of Day 86's video: Mental Calculation Level ...

It's possible to solve some multiplication problems in your head. But sometimes it can help to use other methods instead. These include using visual aids, such as an array or place counters, or by ...

Ever wanted to impress everyone by solving complex multiplication problems in your head, without needing a pencil or paper? It's not magic; it's mental math—a superpower you can learn! This article is ...